you gotta use something better than this to mount to the wall! you need to hit a couple studs with proper wood screws, those drywall plugs wont cut it! I would HATE to see this thing get ripped off the wall when its complete.
edit: btw it looks like it will be awesome!

Well I've tested it and it's all no problem.
The shelve holders can hold up to 60kg each, I'm using 4 of them.
The wall is a sand/stone wall, the screws are M12x120, they can probably hold 150kg each and again I'm using 4.
I tried sitting at one holder and it was no problem.

I'm working with several controllers for fans and lighting and want to have them in groups.
Fans - Top lighting - Bottom lighting
Need multiple cables and extensions from side to side through the 'powerbar'

Like this

Also want some cable managements, all extra cable out of sight in the P5

I want to thank everyone for following this project!
For me personally it was quite a challenge.
First of all because of the available free time I had next to my job and family.
But specially to create a 'Desk PC' below $400 of material. (2xP5 + tools + glass + mounting)
All this with standard tools like a jigsaw, drill, ironsaw, file and sandpaper.